To test Zimbra in a large organisation (currently using Exchange 2003) we're going to conduct a Zimbra-Pilot with apr. 500 users.
For the pilot we're going to migrate the pilot users from Exchange to Zimbra. After the pilot is complete we have to migrate the 500 users back from Zimbra to Exchange.
The two scenario's we're planning;
1. Migration Exchange -> Zimbra
This will be done with the Zimbra Exchange Migration Wizzard.
2. Migration Zimbra -> Exchange
For this part we only came up with the following solution;
Install Outlook with ZOC, target the Zimbra mailbox, export to PST, import to Exchange
Does anyone have a more scalable solution for the 2nd migration, as exporting 500 by mailboxes is very labour intensive.